package com.wang.gulimall.order.config;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * @Author：YH
 * @Description：
 * @Date:Created in 2021/6/16 20:12
 */
//@Component
//public class GuiFeignConfig {
//
//    @Bean(name = "requestInterceptor1")
//    public RequestInterceptor requestInterceptor(){
//        return new RequestInterceptor() {
//            @Override
//            public void apply(RequestTemplate requestTemplate) {
//                ServletRequestAttributes requestAttributes =
//                        (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
//                //老请求
//                HttpServletRequest request = requestAttributes.getRequest();
//                if(request!=null){
//                    //同步请求头数据，主要同步的是cookie的数据
//                    String header = request.getHeader("cookie");
//                    requestTemplate.header("cookie",header);
//                }
//            }
//        };
//    }
//}

@Configuration//  boolean proxyBeanMethods() default true;
/* *3、proxyBeanMethods：代理bean的方法
*Full(proxyBeanMethods=true)、【保证每个@Bean方法被调用多少次返回的组件都是单实例的】
*Lite(proxyBeanMethods=false)【每个@Bean方法被调用多少次返回的组件都是新创建的】
*组件依赖必须使用Full模式默认。其他默认是否Lite模式*/
public class GuiFeignConfig {

    @Bean("requestInterceptor1")
    public RequestInterceptor requestInterceptor() {

        RequestInterceptor requestInterceptor = new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate template) {
                //1、使用RequestContextHolder拿到刚进来的请求数据
                ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();

                if (requestAttributes != null) {
                    //老请求
                    HttpServletRequest request = requestAttributes.getRequest();

                    if (request != null) {
                        //2、同步请求头的数据（主要是cookie）
                        //把老请求的cookie值放到新请求上来，进行一个同步
                        String cookie = request.getHeader("Cookie");
                        template.header("Cookie", cookie);
                    }
                }
            }
        };
        return requestInterceptor;
    }
}
